Warp stop-motion.



PATENTED SEPT. 5, 1905.

C. E. BLAIR.

WARP STOP MOTION.

APPLICATION FILED APB.18,1905.

for:

wzfizesses UNITED STATES PATENT OFFICE.

MESNE ASSlbrNMENlS, TO JAME OHUSETTS.

S K. LANNING, OF BOSTON, ASSA- WARP STOP-MOTION.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed April 13, 1905. Serial No. 255.403-

To all 1072 0112, it inmy concern:

Be it known that I, Ou'ARLns E. BLAIR, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in 'arp Stop- Motions, of which the following is a specification.

This invention has relation to warp-stopmotion apparatus which is rendered effective to stop the operation of the machine in which the stop mechanism is included by the movement of a detector into operative position.

According to the present invention means are provided whereby the detectors may be greatly reduced in number, so as to simplify the apparatus and reduce the cost thereof mechanism is set in operation to stop the loom. ;-\ccording to this invention, however, the detectors engage the warp-threauls in a peculiar and novel manner and are supported thereby, being strung, if desired, upon a guiding member, so that when any one of the threads breaks or becomes abnormally loose a detector may drop into active or operative position.

One embodiment of the invention as applied to a loom is herein illustrated; but it will be understood that the invention is not restricted to such application.

Referring to the accompanying drawings, Figure 1 represents a longitudinal section of a portion of a loom with one embodiment of the invention applied thereto. in this figure the detectors are shown as all being in inoperative or inactive positions. Fig. 2 represents a similar view of a smaller portion of the loom and illustrates one of the detectors in its active or operative position. Fig. 3 represents an enlarged view of one of the detectors in its inactive position. Fig. a represents a similar view with a detector in its active or operative position. Fig. 5 represents a perspective view of one of' the detectors held in its normal or inactive position, and it represents the two warp-threads which support it. Fig. 6 represents a horizontal section through the detectors in a planeabove the warp. Figs. 7 and 8 illustrate how a pair of warp-threads are engaged with a detector.

1 have illustrated the invention as applied to a loom of the Draper type, such as is illustrated in the patent to Draper, No. 6%,951, which patent illustrates a convenient form of stop-motion mechanism which may be utilized in connection with this invention. The loomframe A, the shipper-lever B, the harness O, the knock-off arm B on the rock-shaft B the cam-shaft I) with the cams thereon, the feeler E and the connections between the feelcr, the rock-shaft B, and the cam-operating devices do not differ from the similar elements shown and described in the said patent to Draper.

F F indicate the usual lease-rods, which are indicated as ordinarily at some distance from the whip-roll or bar G. Between the whip-roll and the lease-rod F are placed a series of detectors, each of which is indicated at it. These detectors are preferably formed of relatively thin metallic strips, which, so far as their general features of construction are concerned, may not differ materially from the usual d rop-bar or detector. Each is provided with an eye (1', which may be round, but which I prefer to make relatively wide for rendering more easy the operation of drawing the warp. The eye is illustrated as being substantially ovoid. The detectors are all illustrated as strung in alinemcnt upon a support 7), which extends from side to side of the loom, each detector being provided with a slot through which the support extends. This slot may be arranged longitiulinally of the detector, with its walls parallel to the side edges of the detector; but I prefer to form it it at an angle to the side edges, for a purpose which I shall subsequently describe. The support /1 is illustrated as being arranged above the warp, although this is not material, and it consists of an elongated bar, the ends of which may be supported in any suitable way, and it is so placed that its flat faces are at an inclination to both the vertical and the horizontal and are at the same angle to the side edges of the detector as the slot a therein.

The detectors are all arranged vertically, and when they are all in inactive or inoperative position they all lie in the same transverse vertical planes. When, however, one of the detectors is permitted to drop by the failure of one of its supporting war1')-threa :ls, it drops by gravity and is guided laterally by the support 7) to a position shown in Fig. 4, there occupying a conspicuous position partially out of alinement with the remainder of the drop-bars or detectors, so that it may be easily seen by the operator.

The support 7) and the detectors are arranged above the feeler E and are normally held in inactive relation to said feeler. hen one of the detectors drops, however, into the position shown in Fig. 4, it is engaged by the feeler, with the result that the stop-motion mechanism is set in operation to stop the loom.

Below the warp and on either side of the row of detectors are placed two guides c 0, which may consist of bars, serrated, if desired, and extending from side to side of the loom. These bars are separated far enough apart to permit the lateral movement of the detectors, as previously described. One of these guides c 0 serves as an abutment to resist the thrust of the feeler when one of the detectors drops, it being so arranged that the forward edge of the detector will rest against it when the detector drops into the position shown in Fig. 4:.

In order that one detector may serve for a pair of warp-threads, the warp-threads are entwined, as shown in Figs. 7 and 8. In these figures the two warp-threads are indicated at e 0. Each thread is coiled half a convolution around the other, so that it engages the same face of the detector in front and in the rear of the eye a. The engaged bights of the threads cross in the eye of the detector, so that if one of them breaks the detector is allowed by the other to drop substantially vertically. The warp-threads are in substantially the same horizontal plane, and consequently the detectors may be located at any'convenient vertical transverse plane of the loom independently of the position of the lease-rods.

In drawing the threads one of them is passed across the face of the detector and the other thread is drawn through the eye and after being looped around the first-mentioned thread is drawn back through the eye. In this way while the detector is supported partially by the joint cooperation of both threads it is disengaged from each by the breakage of one of them.

IVhile I have illustrated a simple and con- "venient form of detector, it will be quite apparent that the invention is not limited thereto, since I may have other forms of detectors, such as those" in which an open slot communicates with the eye for making easier the operation of drawing the Warp therethrough. Moreover, while the stop-motion device is illustrated as mechanically operated I contemplate the employment of an electromechanical device in which the dropping of a detector closes the operating-circuit. I have not illustrated such an electromechanical device, as any one of those heretofore employed may be used.

Having thus explained the nature of the invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, I declare that what I claim is 1. In a warp stop-motion, a series of detectors therefor, each having an eye and each maintained inoperative by the joint cooperation therewith of a pair of warp-threads which are intertwined through the eye thereof.

2. In a warp stop-motion, a detector therefor having an eye, said detector being maintained inoperative by the joint cooperation of a pair of warp-threads lying on opposite sides of said detector but having bights intercoiled through the said eye.

3. In a warp stop-motion, a detector therefor having an eye, said detector being maintained inoperative by the joint cooperation of a pair of warp-threads lying on opposite sides of said detector, one of said warp-threads having a loop extending into the said eye and crossed around the other of said warp-threads.

4. In a warp stop-motion, a series of detectors therefor, each having an eye, and means for guiding said detectors substantially vertically, said detectors being each maintained inoperative by the joint cooperation of a pair of warp-threads intertwined at the eye thereof, and both adapted to release said detector and allow it to drop vertically upon the failure of either of them.

5. In a warp stop-motion, a series of elongated detectors normally in alinement and maintained inoperative by the warp-threads and each having a slot inclined to the longitudinal median line thereof, and a guide passed through said slots in said detectors, all combined whereby when one of the detectors drops from a failure of a warp-thread, it is guided laterally out of alinement with the remaining detectors.

In testimony whereof I have aflixed my signature in presence of two witnesses.

CHARLES E. BLAIR.

Witnesses:

M. B. MAY, C. C. STEOHER. 

